Luo Chuan looked at the picture of Guan Shan's pause, and then said to Guan Shan: "This DNA is easy to say, there is a tissue in the interrogation room that he just used." But can you tell me how you used this surveillance to determine that the killer was his? ”

The question asked by Luo Chuan was also very curious by the other police officers. Because in their eyes, they only saw this dirty suspect walking out the back door normally, and there was nothing special about it. The whole time he left the police station, nothing happened, and his demeanor was normal. So everyone was surprised why Guan Shan immediately concluded that Dong Hui was the suspect after seeing the surveillance.

Guan Shan stood up, faced Luo Chuan and the rest of the police officers and said, "We normal people, what do we usually do when we encounter those garbage and debris on the road?" Bypass, of course. The fact that he doesn't go around is a sign that he's not normal. This has nothing to do with whether you love cleanliness or not, naturally, there is a clean and easy way to walk, and no one will step on the garbage to walk through. Unless, he had the intention, the intention to let us see it. ”

"Deliberately show us?" Luo Chuan seemed to be beginning to understand what Guan Shan meant.

Guan Shan nodded very affirmatively and said, "That's right." He told you before that he didn't pay much attention to the subsections because of his work, and I think those are all excuses. Cable work is not a very dirty working environment, and it can't be said to be sloppy to his extent, right? Also, there are many toiling people, and not everyone wipes saliva and snot on themselves. Of course, this does have something to do with people's personalities, and some people are not born to pay so much attention to hygiene. But he came to the police station so cooperatively, and he didn't even ask why. His clothes were dirty, his hands and face were dirty, but his neck and neckline were clean. How can this be explained? It can't be said that a person who doesn't even wash his face and hands much washed his neck before he came, right? Also, his hair was dirty and unnatural, with a rancid smell of oil. He didn't work in the back kitchen, where did he get this greasy? ”

Luo Chuan suddenly understood: "Guan Shan, I understand what you mean. He wanted to deliberately give us the impression that he was dirty and didn't like to be clean. Because our suspects may have a cleanliness fetish. If Dong Hui doesn't like to be clean enough to wipe his nose on his clothes and walk out of the garbage heap, then ...... He can rule out suspicion. ”

"Yes." Guan Shan liked Luo Chuan's comprehension very much.

The police officer on the side couldn't help but interject at this time and said, "Professor Guan, if that's the case, you can close the case by comparing DNA and directly arresting him back!" How do you ...... But not so happy? ”

Guan Shan looked at Luo Chuan worriedly and said, "An ordinary worker, even if he is a murderer, it is impossible for him to do such a thorough anti-psychological investigation. Luo Chuan... There is someone behind him, and there is a person who has studied psychology very well. I don't dare to say that the person who is instructing Dong Hui to commit the murder, but that person must be trying to find a way to help him escape. Even if you get ironclad evidence, as long as the psychiatrist identifies Dong Hui as having serious mental problems, it is impossible for him to be sentenced to death in the law. ”

After listening to Guan Shan's words, everyone realized the seriousness of the matter. Now it is not as simple as getting evidence to arrest Dong Hui, but how to make him unable to escape punishment is the key.

Luo Chuan hesitated for a moment, and then said to Guan Shan: "I remember you said before that the criminals who can successfully pretend to be crazy and escape the law in front of you have not yet appeared. This time, if it does get to the point you just said, it's up to you. ”

"I'll do my best." Guan Shan still doesn't like to talk full.

Because the psychiatric evaluation of criminals has to be done by the relevant departments to find a real professional psychologist to do the evaluation, so from this aspect, Luo Chuan and they can't do anything. The Serious Crime Team of the Criminal Police Team is only responsible for solving the case, and the sentencing decision is a matter for the court, and it has nothing to do with Luo Chuan at all. But when he thought of the female corpses that were forked on the branches, and when he thought of Dong Hui, who had committed such a bad crime, Luo Chuan couldn't suppress the anger in his heart, and felt that he couldn't let this state succeed no matter what.

And just like that, two more days later, the DNA results were out. Iron-clad evidence is in front of you, and the murderer of Poplar Tree is Dong Hui! Moreover, under Ke Xue's detailed investigation, it was found that Dong Hui had bought a large number of sleeping tranquilizers through online transactions. On the forensic side, Tian Zhen and the others also found Dong Hui's dander in the nails of the fourth female corpse. This evidence is enough to accuse Dong Hui of intentional homicide.

Luo Chuan's speed of action was still fast, and he immediately led people to arrest Dong Hui. But when Luo Chuan brought him out of Dong Hui's place of work, Luo Chuan still had a bad premonition. Because Dong Hui was too calm, the police all arrived at the door, and he was still laughing with his colleagues saying that he was helping the people's police to do good deeds, asking his colleagues to bring him tomorrow's breakfast, and by the way, he helped him take today's leave.

It seemed that he was really a good citizen, and he didn't know why the police force kept looking for him.

When he returned to the police force, when Luo Chuan put all the incriminating evidence in front of Dong Hui, the cowardly-looking man actually smiled.

"Hahaha, officer, don't make fun of me. If I had the ability to kill people, who would still be miserable to climb telephone poles every day to make money. My job is climbing, so does that prove me guilty? I don't understand what DNA you're talking about, and I'm a small common person, and I don't want to understand such profound things. I bought sleeping pills because I couldn't sleep, and I bought them many times because the pills were fake and didn't work at all. It's my business that I don't like to be clean, but it's not illegal. We don't have any laws that say that our citizens must be fully dressed and take a shower once a day, right? Dong Hui looked at Luo Chuan with a smile, and there was no fear in his eyes at all.

Guan Shan watched Dong Hui's every move from the side, every expression in his eyes. At this time, he slowly spoke: "In my opinion, when you see the incriminating evidence that Luo Chuan listed for you, the rhetorical attack just shows that your heart is weak. Your claims about the small people, the toiling masses, and the inability to choose your own work all prove that you are not very comfortable with social norms and are not very satisfied with everything. Your words are full of irresponsibility. Your casual nonsense helps the police solve the case, proving that you are also very fond of lying. Indifferent to the tragedy that Luo Chuan said, even if it was not done by you, you did not show any sympathy. You do things recklessly, you don't have any plans, you do what you want. Sensitive, irritable and aggressive. Of the seven criteria for an antisocial personality, more than three can be determined as an antisocial personality, and you, all seven. I don't think it happened overnight, it should have something to do with your childhood circumstances, right? ”